Stock Selection: DeepSeek V3's picks for 2026-09-17
DeepSeek V3 picked GNRC, NBIS, ARM, MU, COHR for a 1-day horizon. Portfolio return vs SPY: -0.38%. Picks that beat SPY: 60%.
| Experiment | Stock Selection |
|---|---|
| Model | DeepSeek V3 |
| Prompt version | stock-selection-v8 |
| Asked | |
| Horizon | 1-day |
| Measured from | 2026-09-17 |
| Measured to | 2026-09-18 |
| Benchmark | SPY |
| Status | Settled |
| Portfolio return vs SPY | -0.38% |
| Picks that beat SPY | 60% |
| Benchmark return | -0.20% |
The picks
| Rank | Symbol | Return | Confidence | vs benchmark | Called right |
|---|---|---|---|---|---|
| 1 | GNRC | -4.19% | 78% | -3.99% | No |
| 2 | NBIS | -1.82% | 74% | -1.62% | No |
| 3 | ARM | +0.70% | 68% | +0.90% | Yes |
| 4 | MU | +1.10% | 65% | +1.31% | Yes |
| 5 | COHR | +1.28% | 62% | +1.48% | Yes |
The model's market view
US equity futures are sharply higher after the Fed's first rate hike in over three years was met with relief that the central bank remains committed to fighting inflation. S&P 500 futures are up roughly 0.8-1.0%, Nasdaq-100 futures up about 1.1-1.4%, pointing to a broad risk-on open. The AI infrastructure complex is leading: data-center power, optical networking and memory names are all bid. Generac's massive Amazon generator deal is the single largest catalyst of the session. Rate-sensitive growth is bouncing after Wednesday's Fed-induced selloff. I am positioning in names with clear, substantive catalysts and strong pre-market momentum that should continue to outperform SPY over the next session.
Why each pick
GNRC
Thesis: Generac announced a long-term supply agreement with Amazon to provide backup power generators for its global data centers, with initial deliveries worth approximately $2.4 billion across 2027-2028 and total deal value potentially reaching $8 billion. Amazon also received warrants to purchase up to 1.69 million shares at roughly $200.93. The deal transforms Generac into a direct AI infrastructure power play and addresses investor concerns about the terminal value of its data-center business. Stephens reaffirmed Overweight with a $335 target; Canaccord raised its target to $375; Barclays and Needham also weighed in positively. The stock closed at $175.11 and was trading around $233 pre-market, up more than 33%. This is a substantive catalyst with clear revenue visibility, not a speculative move. Risks: the magnitude of the pre-market gap means much of the good news may already be priced in; a broad market reversal could cap further upside; execution risk remains as Generac scales manufacturing for large data-center orders.
NBIS
Thesis: Nebius announced a comprehensive round of GPU cloud pricing increases effective October 1, with H100 instances rising approximately 17%, Nvidia B300 GPUs up roughly 21%, and AMD EPYC Genoa CPUs up 25%. This is the second price hike in months and signals persistent, structural demand for AI compute that is outpacing supply. The stock closed at $209.37 and was trading around $225 pre-market, up nearly 9%. Year-to-date the stock has surged roughly 150%. Wall Street consensus is Moderate Buy with an average price target near $290. This is a substantive catalyst: price increases directly expand margins and demonstrate pricing power. Risks: the stock is highly volatile and has already run significantly; a hot inflation print or hawkish Fed commentary could pressure high-multiple AI names; the after-hours move could fade if broad tech sentiment weakens.
ARM
Thesis: Arm CEO Rene Haas told CNBC that he is increasingly confident the company can convert more than $2 billion in customer demand for its AGI CPU into revenue. Haas said supply-chain constraints have eased significantly since July and that visibility into customer demand has improved. The stock closed at $243.98 and was trading around $263 pre-market, up roughly 8%. Arm has been beaten down more than 40% from its 52-week highs, making it a potential bounce candidate. The AI-agent narrative driving CPU demand is a substantive long-term theme. Risks: the catalyst is a CEO interview rather than hard financial results, making it partly speculative; analyst price targets are widely dispersed, with some bearish calls as low as $90; the stock remains expensive on a P/E basis and could sell off if the market rotates out of high-multiple semis.
MU
Thesis: Micron is rallying in sympathy with the broader memory-chip complex as SK Hynix and Intel lead gains. The company guided fiscal Q4 revenue to approximately $50 billion with an 86% gross margin, and Goldman Sachs forecasts Q3 revenue of $51.9 billion with EPS of $32.54, above consensus. TD Cowen maintains a Buy rating with a $1,600 price target. The stock closed at $926.55 and was trading around $940 pre-market, up roughly 1.5%. Wall Street consensus is Strong Buy with an average price target of $1,513. The AI memory demand narrative is substantive and backed by hard guidance. Risks: the stock has already gained 226% year-to-date and may be vulnerable to profit-taking; the actual Q4 earnings report on September 30 is still two weeks away, so the catalyst is anticipatory rather than realized; a broader semiconductor selloff could drag MU lower.
COHR
Thesis: Coherent is riding a broad rally in optical networking and AI data-center supply-chain names. The stock closed at $289.93 on September 16, up 6.92%, making it the second-best performer in the S&P 500 that session. Deutsche Bank initiated coverage with a Buy rating, and the company is set to unveil its PhotonLink platform at ECOC on September 21. The stock was trading around $298 pre-market, up roughly 3%. The AI optical interconnects theme is substantive, driven by hyperscaler demand for high-speed networking in data centers. Risks: the stock fell 24% over the past month before this bounce, indicating significant volatility; the pre-market move is modest and could fade; the ECOC catalyst is still several days away and may not drive immediate follow-through; a broad tech pullback would likely hit high-beta optical names disproportionately.
Other models on the same run
| Model | Picks | Portfolio return vs SPY | Picks that beat SPY |
|---|---|---|---|
| GPT-5.6 Sol | GNRC, VICR, NBIS, AMD, IREN | +0.59% | 60% |
| Claude Opus 5 | SMH, QQQ, XLV, XLK, XLE | +0.47% | 80% |
| Muse Spark 1.1 | XLF, JPM, XLE, BAC, OXY | +0.14% | 60% |
| Grok 4.5 | NVDA, TSLA, SMH, AMD, QQQ | +0.65% | 80% |
| Claude Sonnet 4.5 | GNRC, NBIS, ARM, MU, COHR | -0.38% | 60% |
Written up on ForecastNest Insights: Stock Selection: DeepSeek V3's picks for 2026-09-17.
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